CN113294613A - High-temperature-resistant alloy elbow and processing technology thereof - Google Patents
High-temperature-resistant alloy elbow and processing technology thereof Download PDFInfo
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- CN113294613A CN113294613A CN202110478750.XA CN202110478750A CN113294613A CN 113294613 A CN113294613 A CN 113294613A CN 202110478750 A CN202110478750 A CN 202110478750A CN 113294613 A CN113294613 A CN 113294613A
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- alloy elbow
- elbow
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- XPEIJWZLPWNNOK-UHFFFAOYSA-N (4-phenylphenyl)boronic acid Chemical compound C1=CC(B(O)O)=CC=C1C1=CC=CC=C1 XPEIJWZLPWNNOK-UHFFFAOYSA-N 0.000 claims description 3
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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a high-temperature-resistant alloy elbow and a processing technology thereof, wherein the alloy comprises the following raw materials: by mass percentage, 0.02 percent of carbon, 0.1 to 0.15 percent of nitrogen, 1.3 to 1.5 percent of manganese, 20 to 21 percent of chromium, 10 to 12 percent of nickel, 0.2 to 0.5 percent of silicon, 1 to 1.3 percent of aluminum, 1.3 to 1.9 percent of zirconium, 1 to 2 percent of lanthanum, 2 to 3 percent of cerium, 0.3 to 0.8 percent of neodymium, and the balance of iron; the alloy base is smelted by the formula, and an alloy elbow is obtained by casting molding, and has excellent mechanical property and high temperature resistance under the formula; meanwhile, in the smelting process, ultrasonic treatment is carried out on the alloy elbow, the ultrasonic treatment condition is defined as that the ultrasonic power is 1-2kW and the ultrasonic frequency is 20kHz, in the process, the ultrasonic waves can generate an acoustic cavitation effect, local instantaneous high temperature and high pressure can be generated on the alloy melt, an alloy phase can be dispersed, the alloy structure can be refined, and the mechanical property and the high temperature resistance of the alloy elbow can be effectively improved.
Description
Technical Field
The invention relates to the technical field of alloy elbows, in particular to a high-temperature-resistant alloy elbow and a processing technology thereof.
Background
The alloy elbow is a general name of various elbows, is used for connecting the elbow of a pipeline and is used for connecting two pipes with the same nominal diameter so as to make the pipeline turn at 90 degrees or other angles. It has various materials and wide application of the alloy elbow.
In the existing research, the research on the surface treatment process of the alloy elbow is more and more intensive, in order to improve the high temperature resistance and the corrosion resistance of the alloy elbow, the surface of the alloy elbow is usually treated and then coated with an organic silicon coating, but the conventional organic silicon coating is poor in binding property with a substrate during coating, the high temperature resistance cannot meet the requirements of people, and the practical application is inconvenient.
Aiming at the situation, a high-temperature-resistant alloy elbow and a processing technology thereof are disclosed to solve the problem.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant alloy elbow and a processing technology thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
a processing technology of a high-temperature-resistant alloy elbow comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 1-2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
(2) taking the alloy elbow, placing the alloy elbow in an acetone solution, carrying out ultrasonic cleaning, sequentially washing with absolute ethyl alcohol and deionized water, and carrying out vacuum drying; carrying out laser cleaning on the surface after drying;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting in the dark for later use;
(4) taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuing to react at 60-65 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at the temperature of 180 ℃ and 200 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
The optimized scheme comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 1-2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
(2) placing the alloy elbow in acetone solution, ultrasonically cleaning for 5-10min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying; carrying out laser cleaning on the surface after drying;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting for 20-24 hours in a dark place for later use;
(4) taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuously reacting for 1-1.5h at the temperature of 60-65 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at the temperature of 180 ℃ and 200 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
According to a more optimized scheme, in the step (1), the alloy raw materials comprise: by mass percentage, 0.02 percent of carbon, 0.1 to 0.15 percent of nitrogen, 1.3 to 1.5 percent of manganese, 20 to 21 percent of chromium, 10 to 12 percent of nickel, 0.2 to 0.5 percent of silicon, 1 to 1.3 percent of aluminum, 1.3 to 1.9 percent of zirconium, 1 to 2 percent of lanthanum, 2 to 3 percent of cerium, 0.3 to 0.8 percent of neodymium, and the balance of iron.
According to an optimized scheme, in the step (4), the preparation method of the phenolic resin comprises the following steps: dissolving resorcinol in anhydrous ethanol at 35-40 deg.C, adding dilute hydrochloric acid and terephthalaldehyde, stirring to react for 30-40min, heating to 65-70 deg.C, reacting for 3-4 hr, and adjusting pH with ammonia water to neutral to obtain phenolic resin.
According to a more optimized scheme, in the step (4), the preparation method of the organic silicon resin comprises the following steps: dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-biphenylboronic acid in absolute ethanol, stirring for 20-30min, adding a silane coupling agent solution, adding hydrochloric acid, performing hydrolysis reaction at 50-55 ℃ for 40-50min, heating to 65-70 ℃, and continuing to react for 5-6h to obtain the organic silicon resin.
In an optimized scheme, the preparation steps of the silane coupling agent solution are as follows: putting tannic acid into a Tris-HCl solution, mixing and stirring for 30-40min, adding a silane coupling agent, and uniformly mixing to obtain a silane coupling agent solution;
the silane coupling agent is KH-550.
According to an optimized scheme, in the step (5), the additive is one or more of nano silicon dioxide, mica powder and talcum powder.
In the optimized scheme, in the step (2), the laser power is 15W, the pulse frequency is 600kHz, the scanning speed is 50-100mm/s, and the laser spot diameter is 70 um.
According to the optimized scheme, the alloy elbow is prepared by the processing technology of the high-temperature-resistant alloy elbow.
Compared with the prior art, the invention has the following beneficial effects:
the application discloses a high-temperature-resistant alloy elbow and a processing technology thereof, wherein during preparation, an alloy matrix is smelted by using a formula of 'carbon 0.02%, nitrogen 0.1-0.15%, manganese 1.3-1.5%, chromium 20-21%, nickel 10-12%, silicon 0.2-0.5%, aluminum 1-1.3%, zirconium 1.3-1.9%, lanthanum 1-2%, cerium 2-3%, neodymium 0.3-0.8% and the balance of iron', and the alloy elbow is obtained by casting molding, and has excellent mechanical property and high-temperature resistance under the formula; meanwhile, in the smelting process, ultrasonic treatment is carried out on the alloy elbow, the ultrasonic treatment condition is defined as that the ultrasonic power is 1-2kW and the ultrasonic frequency is 20kHz, in the process, the ultrasonic waves can generate an acoustic cavitation effect, local instantaneous high temperature and high pressure can be generated on the alloy melt, an alloy phase can be dispersed, the alloy structure can be refined, and the mechanical property and the high temperature resistance of the alloy elbow can be effectively improved.
On the basis, in order to further improve the high-temperature resistance of the alloy elbow, the organic coating is coated on the surface of the alloy elbow, the conventional organic polymer is directly coated on the surface of the alloy elbow to form a coating, the adhesion between the coating and an alloy matrix is poor, the coating is easy to fall off, and aiming at the problem, after the alloy elbow is prepared, the surface of the alloy elbow is firstly subjected to laser cleaning, a micro-nano structure is generated on the surface of the alloy elbow after the surface of the alloy elbow is subjected to laser cleaning, the roughness is greatly increased, and meanwhile, oil stains and oxidation films on the surface of the alloy elbow are removed, so that the adhesive force between an organic silicon; on the basis, the poly-dopamine layer is constructed on the surface of the alloy elbow, the poly-dopamine layer has excellent adhesion performance, and the poly-dopamine layer can be used as a double-sided adhesive in the scheme, so that the adhesion between the organic silicon coating and the alloy elbow is improved, and the service life of the coating is prolonged.
When the organic coating is prepared, the organic coating is improved on the basis of the conventional organic silicon coating, resorcinol and terephthalaldehyde are firstly used for reacting to generate multi-aromatic-ring phenolic resin, the performance of benzene rings is stable, and the introduction of a plurality of benzene rings can effectively improve the high-temperature resistance of the organic silicon coating; on the basis, the boron-containing organic silicon resin with excellent high temperature resistance is prepared by taking diphenyl dimethoxysilane, phenyl dimethoxysilane, hexamethyldisiloxane and 4-biphenylboronic acid as raw materials, when the boron-containing organic silicon resin is prepared, a silane coupling agent solution is introduced, the silane coupling agent is a tannic acid-silane coupling agent KH550, the crosslinking density of each component can be effectively improved by adding the silane coupling agent solution, meanwhile, the compatibility between the organic silicon resin and phenolic resin can also be improved, the interaction among the components is improved, and the high temperature resistance of the organic silicon coating is improved.
Meanwhile, the filler is added and prepared by dehydrating boric acid at high temperature, and the boric acid has lower melting temperature, so that pores generated by decomposing the organic silicon resin can be filled, and the compactness of the organic silicon coating is improved by matching with other additives, so that the high-temperature resistance of the organic silicon coating is further improved; the organic silicon coating is coated on the surface of the alloy elbow and is solidified, and the finally obtained alloy elbow has excellent mechanical property and high temperature resistance and can be widely applied to a plurality of technical fields.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a processing technology of a high-temperature-resistant alloy elbow comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 1kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
the alloy raw materials comprise: by mass percentage, 0.02% of carbon, 0.1% of nitrogen, 1.3% of manganese, 20% of chromium, 10% of nickel, 0.2% of silicon, 1.3% of aluminum, 1.9% of zirconium, 2% of lanthanum, 3% of cerium, 0.8% of neodymium and the balance of iron.
(2) Placing the alloy elbow in acetone solution, ultrasonically cleaning for 5min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying; carrying out laser cleaning on the surface after drying, wherein the laser power is 15W, the pulse frequency is 600kHz, the scanning speed is 50mm/s, and the diameter of a laser spot is 70 um;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting for 20 hours in a dark place for later use;
(4) putting tannic acid into a Tris-HCl solution, mixing and stirring for 30min, adding a silane coupling agent, and uniformly mixing to obtain a silane coupling agent solution; the silane coupling agent is KH-550.
Dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-diphenylboric acid in absolute ethanol, stirring for 20min, adding silane coupling agent solution, adding hydrochloric acid, performing hydrolysis reaction at 50 ℃ for 50min, heating to 65 ℃, and continuing to react for 6h to obtain the organic silicon resin.
Dissolving resorcinol in anhydrous ethanol at 35 deg.C, adding dilute hydrochloric acid and terephthalaldehyde, stirring to react for 30min, heating to 65 deg.C, reacting for 4 hr, and adjusting pH to neutral with ammonia water to obtain phenolic resin.
Taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuously reacting for 1.5h at 60 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at 180 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
In the embodiment, the additive is prepared by mixing nano silicon dioxide, mica powder and talcum powder according to the mass ratio of 1:1: 1.
Example 2:
a processing technology of a high-temperature-resistant alloy elbow comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
the alloy raw materials comprise: by mass percentage, 0.02% of carbon, 0.15% of nitrogen, 1.4% of manganese, 21% of chromium, 11% of nickel, 0.3% of silicon, 1.2% of aluminum, 1.5% of zirconium, 1.5% of lanthanum, 2.5% of cerium, 0.5% of neodymium, and the balance of iron.
(2) Placing the alloy elbow in acetone solution, ultrasonically cleaning for 8min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying; carrying out laser cleaning on the surface after drying, wherein the laser power is 15W, the pulse frequency is 600kHz, the scanning speed is 80mm/s, and the diameter of a laser spot is 70 um;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting for 22 hours in a dark place for later use;
(4) putting tannic acid into a Tris-HCl solution, mixing and stirring for 35min, adding a silane coupling agent, and uniformly mixing to obtain a silane coupling agent solution; the silane coupling agent is KH-550.
Dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-diphenylboric acid in absolute ethanol, stirring for 25min, adding silane coupling agent solution, adding hydrochloric acid, performing hydrolysis reaction at 53 deg.C for 45min, heating to 68 deg.C, and continuing to react for 5.5h to obtain the silicone resin.
Dissolving resorcinol in absolute ethanol at 38 deg.C, adding dilute hydrochloric acid and terephthalaldehyde, stirring to react for 35min, heating to 68 deg.C, reacting for 3.5 hr, and adjusting pH to neutral with ammonia water to obtain phenolic resin.
Taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuously reacting for 1.4h at 62 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at 190 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
In the embodiment, the additive is prepared by mixing nano silicon dioxide, mica powder and talcum powder according to the mass ratio of 1:1: 1. In the examples, by weight, 30 parts of modified silicone resin, 12 parts of filler, 6 parts of additive, 35 parts of solvent, 3 parts of dispersant and 3 parts of defoaming agent.
Example 3:
a processing technology of a high-temperature-resistant alloy elbow comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
the alloy raw materials comprise: by mass percentage, 0.02% of carbon, 0.15% of nitrogen, 1.5% of manganese, 21% of chromium, 12% of nickel, 0.5% of silicon, 1% of aluminum, 1.3% of zirconium, 1% of lanthanum, 2% of cerium, 0.3% of neodymium and the balance of iron.
(2) Placing the alloy elbow in acetone solution, ultrasonically cleaning for 10min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying; carrying out laser cleaning on the surface after drying, wherein the laser power is 15W, the pulse frequency is 600kHz, the scanning speed is 100mm/s, and the diameter of a laser spot is 70 um;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting for 24 hours in a dark place for later use;
(4) putting tannic acid into a Tris-HCl solution, mixing and stirring for 40min, adding a silane coupling agent, and uniformly mixing to obtain a silane coupling agent solution; the silane coupling agent is KH-550.
Dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-diphenylboric acid in absolute ethanol, stirring for 30min, adding silane coupling agent solution, adding hydrochloric acid, performing hydrolysis reaction at 55 ℃ for 40min, heating to 70 ℃, and continuing to react for 5h to obtain the organic silicon resin.
Dissolving resorcinol in absolute ethanol at 40 deg.C, adding dilute hydrochloric acid and terephthalaldehyde, stirring to react for 30min, heating to 70 deg.C, reacting for 3 hr, and adjusting pH to neutral with ammonia water to obtain phenolic resin.
Taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuously reacting for 1h at 65 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at 200 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
In the embodiment, the additive is prepared by mixing nano silicon dioxide, mica powder and talcum powder according to the mass ratio of 1:1: 1. In the examples, by weight, 30 parts of modified silicone resin, 12 parts of filler, 6 parts of additive, 35 parts of solvent, 3 parts of dispersant and 3 parts of defoaming agent.
Comparative example 1:
a processing technology of a high-temperature-resistant alloy elbow comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
the alloy raw materials comprise: by mass percentage, 0.02% of carbon, 0.15% of nitrogen, 1.4% of manganese, 21% of chromium, 11% of nickel, 0.3% of silicon, 1.2% of aluminum, 1.5% of zirconium, 1.5% of lanthanum, 2.5% of cerium, 0.5% of neodymium, and the balance of iron.
(2) Placing the alloy elbow in acetone solution, ultrasonically cleaning for 8min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting for 22 hours in a dark place for later use;
(4) putting tannic acid into a Tris-HCl solution, mixing and stirring for 35min, adding a silane coupling agent, and uniformly mixing to obtain a silane coupling agent solution; the silane coupling agent is KH-550.
Dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-diphenylboric acid in absolute ethanol, stirring for 25min, adding silane coupling agent solution, adding hydrochloric acid, performing hydrolysis reaction at 53 deg.C for 45min, heating to 68 deg.C, and continuing to react for 5.5h to obtain the silicone resin.
Dissolving resorcinol in absolute ethanol at 38 deg.C, adding dilute hydrochloric acid and terephthalaldehyde, stirring to react for 35min, heating to 68 deg.C, reacting for 3.5 hr, and adjusting pH to neutral with ammonia water to obtain phenolic resin.
Taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuously reacting for 1.4h at 62 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at 190 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
In the embodiment, the additive is prepared by mixing nano silicon dioxide, mica powder and talcum powder according to the mass ratio of 1:1: 1; in the examples, by weight, 30 parts of modified silicone resin, 12 parts of filler, 6 parts of additive, 35 parts of solvent, 3 parts of dispersant and 3 parts of defoaming agent.
Comparative example 1 the parameters were changed on the basis of example 2, and comparative example 1 was not added to the laser cleaning, and the rest of the process was identical to example 2.
Comparative example 2:
a processing technology of a high-temperature-resistant alloy elbow comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
the alloy raw materials comprise: by mass percentage, 0.02% of carbon, 0.15% of nitrogen, 1.4% of manganese, 21% of chromium, 11% of nickel, 0.3% of silicon, 1.2% of aluminum, 1.5% of zirconium, 1.5% of lanthanum, 2.5% of cerium, 0.5% of neodymium, and the balance of iron.
(2) Placing the alloy elbow in acetone solution, ultrasonically cleaning for 8min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying; carrying out laser cleaning on the surface after drying, wherein the laser power is 15W, the pulse frequency is 600kHz, the scanning speed is 80mm/s, and the diameter of a laser spot is 70 um;
(3) putting tannic acid into a Tris-HCl solution, mixing and stirring for 35min, adding a silane coupling agent, and uniformly mixing to obtain a silane coupling agent solution; the silane coupling agent is KH-550.
Dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-diphenylboric acid in absolute ethanol, stirring for 25min, adding silane coupling agent solution, adding hydrochloric acid, performing hydrolysis reaction at 53 deg.C for 45min, heating to 68 deg.C, and continuing to react for 5.5h to obtain the silicone resin.
Dissolving resorcinol in absolute ethanol at 38 deg.C, adding dilute hydrochloric acid and terephthalaldehyde, stirring to react for 35min, heating to 68 deg.C, reacting for 3.5 hr, and adjusting pH to neutral with ammonia water to obtain phenolic resin.
Taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuously reacting for 1.4h at 62 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(4) taking boric acid, dehydrating at 190 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (3) coating the surface of the alloy elbow treated in the step (2) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
In the embodiment, the additive is prepared by mixing nano silicon dioxide, mica powder and talcum powder according to the mass ratio of 1:1: 1. In the examples, by weight, 30 parts of modified silicone resin, 12 parts of filler, 6 parts of additive, 35 parts of solvent, 3 parts of dispersant and 3 parts of defoaming agent.
Comparative example 2 the parameters were changed on the basis of example 2, comparative example 2 was not provided with a polydopamine layer, and the remaining process was identical to example 2.
Comparative example 3:
a processing technology of a high-temperature-resistant alloy elbow comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
the alloy raw materials comprise: by mass percentage, 0.02% of carbon, 0.15% of nitrogen, 1.4% of manganese, 21% of chromium, 11% of nickel, 0.3% of silicon, 1.2% of aluminum, 1.5% of zirconium, 1.5% of lanthanum, 2.5% of cerium, 0.5% of neodymium, and the balance of iron.
(2) Placing the alloy elbow in acetone solution, ultrasonically cleaning for 8min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying; carrying out laser cleaning on the surface after drying, wherein the laser power is 15W, the pulse frequency is 600kHz, the scanning speed is 80mm/s, and the diameter of a laser spot is 70 um;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting for 22 hours in a dark place for later use;
(4) dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-diphenylboric acid in absolute ethanol, stirring for 25min, adding KH-550, adding hydrochloric acid, performing hydrolysis reaction at 53 deg.C for 45min, heating to 68 deg.C, and continuing to react for 5.5h to obtain the silicone resin.
Dissolving resorcinol in absolute ethanol at 38 deg.C, adding dilute hydrochloric acid and terephthalaldehyde, stirring to react for 35min, heating to 68 deg.C, reacting for 3.5 hr, and adjusting pH to neutral with ammonia water to obtain phenolic resin.
Taking the organic silicon resin, the phenolic resin and KH-550, continuously reacting for 1.4h at 62 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at 190 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
In the embodiment, the additive is prepared by mixing nano silicon dioxide, mica powder and talcum powder according to the mass ratio of 1:1: 1. In the examples, by weight, 30 parts of modified silicone resin, 12 parts of filler, 6 parts of additive, 35 parts of solvent, 3 parts of dispersant and 3 parts of defoaming agent.
Comparative example 3 the parameters were changed on the basis of example 2, and comparative example 3 was carried out by adding only the silane coupling agent KH-550 alone, and the rest of the process was identical to example 2.
Comparative example 4:
a processing technology of a high-temperature-resistant alloy elbow comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
the alloy raw materials comprise: by mass percentage, 0.02% of carbon, 0.15% of nitrogen, 1.4% of manganese, 21% of chromium, 11% of nickel, 0.3% of silicon, 1.2% of aluminum, 1.5% of zirconium, 1.5% of lanthanum, 2.5% of cerium, 0.5% of neodymium, and the balance of iron.
(2) Placing the alloy elbow in acetone solution, ultrasonically cleaning for 8min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying; carrying out laser cleaning on the surface after drying, wherein the laser power is 15W, the pulse frequency is 600kHz, the scanning speed is 80mm/s, and the diameter of a laser spot is 70 um;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting for 22 hours in a dark place for later use;
(4) putting tannic acid into a Tris-HCl solution, mixing and stirring for 35min, adding a silane coupling agent, and uniformly mixing to obtain a silane coupling agent solution; the silane coupling agent is KH-550.
Dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-diphenylboric acid in absolute ethanol, stirring for 25min, adding silane coupling agent solution, adding hydrochloric acid, performing hydrolysis reaction at 53 deg.C for 45min, heating to 68 deg.C, and continuing to react for 5.5h to obtain the silicone resin.
Taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuously reacting for 1.4h at 62 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at 190 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
In the embodiment, the additive is prepared by mixing nano silicon dioxide, mica powder and talcum powder according to the mass ratio of 1:1: 1. In the examples, by weight, 30 parts of modified silicone resin, 12 parts of filler, 6 parts of additive, 35 parts of solvent, 3 parts of dispersant and 3 parts of defoaming agent.
Comparative example 4 a parameter change was made on the basis of example 2, comparative example 4 only adding a conventional phenolic resin, and the rest of the process was identical to example 2.
Comparative example 5:
comparative example 5 the parameters were changed on the basis of example 2, comparative example 5 did not add fillers, and the rest of the process was identical to example 2.
And (3) detection test:
1. the samples prepared in examples 1 to 3 and comparative examples 1 to 5 were tested for adhesion according to GB/T9286-1998 test for paint and varnish test;
2. samples prepared in examples 1 to 3 and comparative examples 1 to 5 were taken and tested for heat resistance according to GB/T1735 to 2009 test for Heat resistance of colored paint and varnish, respectively.
And (4) conclusion: the alloy elbow prepared by the method has excellent mechanical property and high temperature resistance, can be widely applied to a plurality of technical fields, and has high practicability.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A processing technology of a high-temperature-resistant alloy elbow is characterized by comprising the following steps: the method comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 1-2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
(2) taking the alloy elbow, placing the alloy elbow in an acetone solution, carrying out ultrasonic cleaning, sequentially washing with absolute ethyl alcohol and deionized water, and carrying out vacuum drying; carrying out laser cleaning on the surface after drying;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting in the dark for later use;
(4) taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuing to react at 60-65 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at the temperature of 180 ℃ and 200 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
2. The processing technology of the high-temperature-resistant alloy elbow according to claim 1, characterized in that: the method comprises the following steps:
(1) taking alloy raw materials, mixing, putting into a vacuum induction furnace, smelting, carrying out ultrasonic treatment on a melt during smelting, wherein the ultrasonic power is 1-2kW, the ultrasonic frequency is 20kHz, and cooling, forging and forming to obtain an alloy elbow;
(2) placing the alloy elbow in acetone solution, ultrasonically cleaning for 5-10min, sequentially washing with anhydrous ethanol and deionized water, and vacuum drying; carrying out laser cleaning on the surface after drying;
(3) placing the alloy elbow treated in the step (2) in a dopamine hydrochloride solution, and stirring and reacting for 20-24 hours in a dark place for later use;
(4) taking the organic silicon resin, the phenolic resin and the silane coupling agent solution, continuously reacting for 1-1.5h at the temperature of 60-65 ℃, and carrying out reduced pressure distillation to obtain modified organic silicon resin;
(5) taking boric acid, dehydrating at the temperature of 180 ℃ and 200 ℃, crushing and grinding, and sieving with a 400-mesh sieve to obtain a filler;
taking modified organic silicon resin, a filler, an additive, a solvent, a dispersant and a defoaming agent, mixing and stirring uniformly to obtain high-temperature-resistant slurry;
and (4) coating the surface of the alloy elbow treated in the step (3) with high-temperature-resistant slurry, and drying and curing to obtain a finished product.
3. The processing technology of the high-temperature-resistant alloy elbow according to claim 2, characterized in that: in the step (1), the alloy raw materials comprise: by mass percentage, 0.02 percent of carbon, 0.1 to 0.15 percent of nitrogen, 1.3 to 1.5 percent of manganese, 20 to 21 percent of chromium, 10 to 12 percent of nickel, 0.2 to 0.5 percent of silicon, 1 to 1.3 percent of aluminum, 1.3 to 1.9 percent of zirconium, 1 to 2 percent of lanthanum, 2 to 3 percent of cerium, 0.3 to 0.8 percent of neodymium, and the balance of iron.
4. The processing technology of the high-temperature-resistant alloy elbow according to claim 2, characterized in that: in the step (4), the preparation method of the phenolic resin comprises the following steps: dissolving resorcinol in anhydrous ethanol at 35-40 deg.C, adding dilute hydrochloric acid and terephthalaldehyde, stirring to react for 30-40min, heating to 65-70 deg.C, reacting for 3-4 hr, and adjusting pH with ammonia water to neutral to obtain phenolic resin.
5. The processing technology of the high-temperature-resistant alloy elbow according to claim 2, characterized in that: in the step (4), the preparation method of the organic silicon resin comprises the following steps: dissolving diphenyldimethoxysilane, phenyldimethoxysilane, hexamethyldisiloxane and 4-biphenylboronic acid in absolute ethanol, stirring for 20-30min, adding a silane coupling agent solution, adding hydrochloric acid, performing hydrolysis reaction at 50-55 ℃ for 40-50min, heating to 65-70 ℃, and continuing to react for 5-6h to obtain the organic silicon resin.
6. The processing technology of the high-temperature-resistant alloy elbow according to claim 5, characterized in that: the preparation steps of the silane coupling agent solution are as follows: putting tannic acid into a Tris-HCl solution, mixing and stirring for 30-40min, adding a silane coupling agent, and uniformly mixing to obtain a silane coupling agent solution;
the silane coupling agent is KH-550.
7. The processing technology of the high-temperature-resistant alloy elbow according to claim 2, characterized in that: in the step (5), the additive is any one or more of nano silicon dioxide, mica powder and talcum powder.
8. The processing technology of the high-temperature-resistant alloy elbow according to claim 2, characterized in that: in the step (2), the laser power is 15W, the pulse frequency is 600kHz, the scanning speed is 50-100mm/s, and the diameter of a laser spot is 70 um.
9. The alloy elbow prepared by the processing technology of the high-temperature-resistant alloy elbow according to any one of claims 1-8.
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